306 MR. BRODERIP ON THE GENUS CHAMA. 
CHAMA SPINOSA. 
Tab. XXXVIII. Fig. 8 (Junior) ; 9 (Senior). 
Chama testd albd interdum roseo vel purpureo umbonem versus value superioris pictd, spinis 
fornicatis creberrimis horridd ; intus alba, limbo integro. 
Hab. in Oceano Pacifico. (Lord Hood’s Island.) 
This pretty species was dredged up by Mr. Cuming attached to corals and Avicule at 
a depth ranging from three to seven fathoms. 
The younger specimens are tinged towards the umbo of the upper valve with a deli- 
cate rose-colour. The umbo of the lower valve is often produced after the manner of 
that of Chama unicornis, Lam. 
CHAMA SORDIDA. 
Tab. XXXIX. Fig. 8 (Junior) ; 9 (Senior). 
Chama testé albidd subroseo varid, vel toté subrosed, creberrimé striatd, hinc et hinc foliaceé ; 
intus alba, limbo crenulato. 
Hab. in America Centrali. (Isle of Cuma.) 
This species, which varies much according to its age, but never appears to grow toa 
large size, was dredged up by Mr. Cuming from a depth of eighteen fathoms, attached 
to rocks. 
Old specimens have the lower valve often very much produced. 
